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Hobsons Bay CityCommunity profile

Williamstown

Five year age groups

In 2021, the largest age group in Williamstown was 50 to 54 year olds. The group that changed the most since 2006 was 60 to 64 year olds, increasing by 369 people.

The Age Structure of Williamstown provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Williamstown's residential role and function and how it is likely to change in the future.

Five year age groups present a classic age profile of the population. Each age group covers exactly five years, which enables direct comparison between each group.

To get a more complete picture Williamstown's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.

Q:

Derived from the Census question:

'What is the person's date of birth or age?'

Age structure - Five year age groups
Williamstown - Total persons (Enumerated)20212006Change
Five year age groups (years)Number%Hobsons Bay City %Number%Hobsons Bay City %2006 to 2021
0 to 44684.16.36776.86.6-209
5 to 97346.46.46666.76.4+68
10 to 148907.85.96916.96.5+198
15 to 196966.14.95005.06.2+195
20 to 245695.05.04554.66.1+113
25 to 294163.66.24614.66.2-46
30 to 345144.57.46386.47.7-125
35 to 396035.38.18298.38.4-227
40 to 447997.07.59289.38.3-129
45 to 499238.17.18848.87.7+39
50 to 541,0088.87.07277.36.3+281
55 to 599618.46.36756.75.7+286
60 to 648407.35.84714.74.2+369
65 to 696755.94.73493.53.7+326
70 to 745755.04.02482.53.4+326
75 to 793653.22.83373.42.9+27
80 to 842111.82.12292.32.1-19
85 and over2131.92.32352.41.5-22
Total population11,460100.0100.010,008100.0100.0+1,451
Source: Australian Bureau of Statistics, Census of Population and Housing 2006 and 2021. Compiled and presented by .id (informed decisions).
Please refer to specific data notes for more information

Dominant groups

Analysis of the five year age groups of Williamstown in 2021 compared to Hobsons Bay City shows that there was a similar proportion of people in the younger age groups (under 15) and a higher proportion of people in the older age groups (65+).

Overall, 18.3% of the population was aged between 0 and 15, and 17.8% were aged 65 years and over, compared with 18.6% and 16.0% respectively for Hobsons Bay City.

The major differences between the age structure of Williamstown and Hobsons Bay City were:

  • A smaller percentage of persons aged 30 to 34 (4.5% compared to 7.4%)
  • A smaller percentage of persons aged 35 to 39 (5.3% compared to 8.1%)
  • A smaller percentage of persons aged 25 to 29 (3.6% compared to 6.2%)
  • A smaller percentage of persons aged 0 to 4 (4.1% compared to 6.3%)

Emerging groups

From 2006 to 2021, Williamstown's population increased by 1,452 people (14.5%). This represents an average annual population change of 0.91% per year over the period.

The largest changes in age structure in this area between 2006 and 2021 were in the age groups:

  • 60 to 64 (+369 persons)
  • 70 to 74 (+326 persons)
  • 65 to 69 (+326 persons)
  • 55 to 59 (+286 persons)

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